Girls Aloud's lesbian stalker

Girls Aloud have stepped up security after finding a naked lesbian stalker in their dressing room.

The sexy girl group - Cheryl Cole, Nadine Coyle, Sarah Harding, Nicola Roberts and Kimberley Walsh - have hired five former SAS guards after discovering the obsessed fan waiting forthem backstage following their performance at London's G-A-Y club on Saturday (17.11.07).

A source said: "Originally they were a bit shocked when they found her there, but laughed it off. But then they started thinking about the serious nature of the situation.

"It's a little unnerving, this woman has been following them everywhere. So they decided to get a guard each so that no one is ever put at risk."

It is believed the woman staged the stunt as a birthday present for Sarah who turned 26 on Saturday and Kimberley who celebrates her 26th birthday today (20.11.07).

The evening didn't start well for the girls either.

Nicola was left in floods of tears just minutes before taking to the stage following a vicious argument with boyfriend Carl Davis.

Carl allegedly stormed into the girls' dressing room and started pushing the flame-haired singer towards the door.

A source said: "He stormed into the dressing room and started screaming at Nicola. It's like he's jealous of her success.

"He was suggesting she'd become too big for her boots, saying things like, 'Why do you think you're so good?' He was pushing her towards the door to get her outside. The girls had to step in and stick up for Nicola."

Luckily, security were not far away and they quickly escorted Carl out of the venue.

The incident has left the band concerned about the couple's stormy relationship.

In March, Nicole and Carl had a huge row at the NME Awards after-party in London, while in May they were seen pushing each other in a Liverpool nightclub.